Home / 661,307.98-911,748.43-428,320.39

Finding the Fourth Proportional to 661,307.98, 911,748.43 and 428,320.39

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Solution

The fourth proportional to 661,307.98, 911,748.43 and 428,320.39 is: 590,527.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,307.98 : 911,748.43 = 428,320.39 : x
  2. Step 2: Convert to fraction form
    661,307.98/911,748.43 = 428,320.39/x
  3. Step 3: Cross multiply
    661,307.98x = 911,748.43 × 428,320.39
  4. Step 4: Simplify right side
    661,307.98x = 390,520,439,769.32
  5. Step 5: Solve for x
    x = 390,520,439,769.32/661,307.98
  6. Step 6: Final answer
    x = 590,527.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.